Materials 2013, 6(1), 184-197; doi:10.3390/ma6010184
Article

Nanocrystalline Akaganeite as Adsorbent for Surfactant Removal from Aqueous Solutions

1,2,* email, 2email and 2email
Received: 13 November 2012; in revised form: 6 January 2013 / Accepted: 8 January 2013 / Published: 10 January 2013
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: The present study presents the effective use of nanocrystalline akaganeite for the adsorption of an anionic (SDS), a cationic (CTAB), and a nonionic (tween80) surfactant from wastewater. Equilibrium experiments, as well as thermodynamic analysis, were performed. The maximum SDS adsorption occurs at the lowest pH value (5), the opposite is observed for CTAB (pH = 11), while for tween80, the change of pH value did not affect the adsorption. The equilibrium data could be described by Freundlich and Langmuir isotherms. The maximum adsorption capacity at 25 °C (pH = 8) was 823.96 mg/g for SDS, 1007.93 mg/g for CTAB, and 699.03 mg/g for tween80. The thermodynamic parameters revealed the exothermic and spontaneity nature of the process. Also, FTIR measurements established that surfactants are adsorbed on the surface of akaganeite, replacing adsorbed water.
Keywords: akaganeite; removal; adsorption; surfactant
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MDPI and ACS Style

Kyzas, G.Z.; Peleka, E.N.; Deliyanni, E.A. Nanocrystalline Akaganeite as Adsorbent for Surfactant Removal from Aqueous Solutions. Materials 2013, 6, 184-197.

AMA Style

Kyzas GZ, Peleka EN, Deliyanni EA. Nanocrystalline Akaganeite as Adsorbent for Surfactant Removal from Aqueous Solutions. Materials. 2013; 6(1):184-197.

Chicago/Turabian Style

Kyzas, George Z.; Peleka, Efrosyni N.; Deliyanni, Eleni A. 2013. "Nanocrystalline Akaganeite as Adsorbent for Surfactant Removal from Aqueous Solutions." Materials 6, no. 1: 184-197.

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